/Engine/Source/Editor/SequencerCore/Public/MVVM/ViewModels/ViewModel.h
Gets the next sibling of this data model in the children list it belongs to
[TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FViewModel](API\Editor\SequencerCore\MVVM\ViewModels\FViewModel) > GetPreviousSibling() const